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nir/opt_algebraic: create more bit test
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Helps hackends with has_bit_test more (i.e. ACO), but it
shouldn't hurt others either.

Foz-DB Navi21:
Totals from 1138 (1.17% of 97591) affected shaders:
Instrs: 5478747 -> 5476055 (-0.05%); split: -0.05%, +0.00%
CodeSize: 29850188 -> 29853140 (+0.01%); split: -0.04%, +0.05%
SpillSGPRs: 1406 -> 1401 (-0.36%)
Latency: 42324245 -> 42325921 (+0.00%); split: -0.01%, +0.01%
InvThroughput: 11396940 -> 11394048 (-0.03%); split: -0.04%, +0.01%
VClause: 142294 -> 142309 (+0.01%); split: -0.00%, +0.01%
SClause: 124412 -> 124411 (-0.00%); split: -0.00%, +0.00%
Copies: 572696 -> 572749 (+0.01%); split: -0.02%, +0.03%
Branches: 199932 -> 199929 (-0.00%)
PreSGPRs: 73372 -> 74970 (+2.18%)
PreVGPRs: 79514 -> 79511 (-0.00%)
VALU: 3628764 -> 3625744 (-0.08%); split: -0.08%, +0.00%
SALU: 818258 -> 818475 (+0.03%); split: -0.03%, +0.06%

Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38700>
This commit is contained in:
Georg Lehmann 2025-11-27 15:52:13 +01:00 • committed by Marge Bot
parent f9ef7e0f64
commit 653716b745
1 changed files with 4 additions and 0 deletions
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4
src/compiler/nir/nir_opt_algebraic.py
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@ -233,6 +233,10 @@ optimizations = [
(('iand', ('iand', a, b), ('ior', a, c)), ('iand', a, b)),
(('ieq', ('iand', a, '#b(is_pos_power_of_two)'), b), ('ine', ('iand', a, b), 0)),
(('ine', ('iand', a, '#b(is_pos_power_of_two)'), b), ('ieq', ('iand', a, b), 0)),
(('uge', ('iand', a, '#b(is_pos_power_of_two)'), b), ('ine', ('iand', a, b), 0)),
(('ult', ('iand', a, '#b(is_pos_power_of_two)'), b), ('ieq', ('iand', a, b), 0)),
(('ige', ('iand', a, b), '#b(is_pos_power_of_two)'), ('ine', ('iand', a, b), 0)),
(('ilt', ('iand', a, b), '#b(is_pos_power_of_two)'), ('ieq', ('iand', a, b), 0)),
(('ieq', ('ushr(is_used_once)', a, '#b'), 0), ('ult', a, ('ishl', 1, b))),
(('ine', ('ushr(is_used_once)', a, '#b'), 0), ('uge', a, ('ishl', 1, b))),
(('~fadd', ('fneg', a), a), 0.0),